Keyboard



FIG. 1 is a front perspective view of a keyboard, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a bottom perspective view thereof;

FIG. 9 is another perspective view thereof in an environment of use; and,

FIG. 10 is another side view thereof in an environment of use.

The broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 